Heat accumulator, in particular for latent heat, and method of manufacture of the same

Abstract

A heat accumulator, in particular latent-heat accumulator, has an inner casing containing an accumulator core and with an outer casing enclosing the inner casing at a distance thereto so as to form an insulation space, the insulation space being baked out and evacuated. The inner casing has a pipe connection with a fill opening through which the storage medium can b introduced and which can be closed by a mechanical closing element after the storage medium has been introduced. The outer casing has a pipe connection with a fill opening through which the insulation space can be filled with insulating medium and or evacuated and which can be closed by a mechanical closing element. The pipe connection of the inner casing is disposed coaxially to the pipe connection of the outer casing. This simplifies manufacture of the heat accumulator.

What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims: 
     
       1. A heat accumulator, comprising an inner casing containing an accumulator core with a storage medium; an outer casing enclosing said inner casing at a distance thereto so as to form an insulation space, said inner casing having a pipe connection with a fill opening through which the storage medium is introducible; a mechanical closing element which closes said fill opening after the storage medium has been introduced, said outer casing also having a pipe connection with a fill opening through which said insulation space is fillable with an insulating medium or evacuatable; a mechanical closing element for closing said filling opening of said pipe connection of said outer casing, said pipe connection of said inner casing being disposed coaxially to said pipe connection of said outer casing, said pipe connection of said inner casing extending through said pipe connection of said outer casing and has an end projecting over said pipe connection of said outer casing, said closing element of said pipe connection of said inner casing being located outside said insulation space, said pipe connections forming an annular space therebetween, said closing element of said pipe connection of said outer casing being penetrated by said pipe connection of said inner casing and closing said annular space between said pipe connections; and an additional closing member which is insertable in said annular space between said pipe connections. 
     
     
       2. A heat accumulator as defined in claim 1, wherein each of said closing element is formed by a closing cap which is screwable on. 
     
     
       3. A heat accumulator as defined in claim 1, wherein each of said closing element is formed by a closing screw which is screwable in. 
     
     
       4. A heat accumulator as defined in claim 1; and further comprising a sealing element formed so as to provide vacuum-tight sealing and arranged between said pipe connection of said inner casing and said closing element of said pipe connection of said inner casing. 
     
     
       5. A heat accumulator as defined in claim 4, wherein said sealing element is formed as a sealing ring. 
     
     
       6. A heat accumulator as defined in claim 4, wherein said sealing element is composed of a non-hygroscopic plastic. 
     
     
       7. A heat accumulator as defined in claim 1, wherein at least one of said closing elements is formed as a closing member which is fastenable by application of heat. 
     
     
       8. A heat accumulator as defined in claim 7, wherein said closing member is formed as a member selected from the group consisting of a plate, a ring and a cap. 
     
     
       9. A heat accumulator as defined in claim 1, wherein said additional closing member is a temporary closing member.